/usr/include/dune/common/function.hh is in libdune-common-dev 2.3.1-1.
This file is owned by root:root, with mode 0o644.
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// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_FUNCTION_HH
#define DUNE_FUNCTION_HH
#include "typetraits.hh"
namespace Dune {
/** @addtogroup Common
@{
*/
/*! \file
\brief Simple base class templates for functions.
*/
/**
* \brief Base class template for function classes
*
* \tparam Domain Type of input variable. This could be some 'const T' or 'const T&'.
*
* \tparam Range Type of output variable. This should be some non-const 'T&' to allow to return results.
*/
template <class Domain, class Range>
class Function
{
typedef typename ConstantVolatileTraits<typename TypeTraits< Domain >::ReferredType >::UnqualifiedType RawDomainType;
typedef typename ConstantVolatileTraits<typename TypeTraits< Range >::ReferredType >::UnqualifiedType RawRangeType;
public:
//! Raw type of input variable with removed reference and constness
typedef RawRangeType RangeType;
//! Raw type of output variable with removed reference and constness
typedef RawDomainType DomainType;
//! Traits class containing raw types
struct Traits
{
typedef RawDomainType DomainType;
typedef RawRangeType RangeType;
};
/**
* \brief Function evaluation.
*
* \param x Argument for function evaluation.
* \param y Result of function evaluation.
*/
void evaluate(const typename Traits::DomainType& x, typename Traits::RangeType& y) const;
}; // end of Function class
/**
* \brief Virtual base class template for function classes.
*
* \tparam DomainType The type of the input variable is 'const DomainType &'
*
* \tparam RangeType The type of the output variable is 'RangeType &'
*/
template <class DomainType, class RangeType>
class VirtualFunction :
public Function<const DomainType&, RangeType&>
{
public:
typedef typename Function<const DomainType&, RangeType&>::Traits Traits;
virtual ~VirtualFunction() {}
/**
* \brief Function evaluation.
*
* \param x Argument for function evaluation.
* \param y Result of function evaluation.
*/
virtual void evaluate(const typename Traits::DomainType& x, typename Traits::RangeType& y) const = 0;
}; // end of VirtualFunction class
/** @} end documentation */
} // end namespace
#endif
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